The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
Hololens: Get scale from spatial understanding plane
I'm currently working with Hololens, where I make an app to place objects in the room. I use the spatial understanding script (from fragments) to place the objects (the user can place them with gaze input and tap). Now I have to be able to scale the object to the right size of the available space. How can I find how big the plane the user wants to put the object on?